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Basic Mechanical engineerning

Growing Chinese Presence in South Asia
Introduction
Growing Chinese influence in South Asia has been very evident in the past few years. When Sri Lanka decided to develop the Hambantota port and areas around it, the Sri Lankan government was not very keen on taking assistance [...]

Ans. An alloy steel may be defined as steel to which elements other than
carbon are added in sufficient amount to produce improvements in steel.
Commonly used alloy elements are nickel. chromium, manganese, silicon,
molybdenum, vanadium, phosphorus, tungsten, titanium, copper, zirconium,
cobalt and aluminium. These elements may be [...]

Ans. The material properties which are associated with the ability of the
material to resist mechanical forces and loads are known as mechanical
properties. The mechanical properties are a measure of the strength and lasting
characteristics of a material in service. Some important mechanical properties
are described below [...]

Ans. Fig· 1.1 shows an Iron-carbon equilibrium diagram since any iron
carbon alloy in the molten state may be considered as a solution of iron carbide
Fe3C in iron. Therefore, it is also called as iron-iron carbide equilibrium diagram.
An equilibrium phase or constitutional diagram is a [...]

Ans. As the name indicates, high speed steel is used for high speed cutting
tools. These steels can be divided into two groups depending upon the principal
alloying element. The first group is called tungsten high speed steels and is
designated by T-series. Steels of this group [...]

Ans. According to IS : 7598-1974 steels shall be classified as follows-
(i) Unalloyed or plain carbon steels
(ii) Alloy steels.
Other criteria of classification of steels are discussed below –
Classification of Steels depending upon the Carbon Content- the unalloyed or plain carbon steels varying from 0.05% [...]

Ans. Steel is an alloy of iron and carbon, with the carbon content varies
upto 1.5%. The carbon is distributed throughout the metal as a compound
(chemical combination) with iron. If the carbon is raised above 1.5%, a stage
soon arrives when no more carbon can be [...]

Ans. Composition- Wrought iron is the purest form of iron. It contains
less than 0.1% carbon. It is a ferrous material and more corrosion resistant
than steel.
Wrought iron produced by puddling process contains carbon content
less than 0.03%, silicon is about 13%, sulphur is less than 0.02%, [...]